A 13-year-old running for governor in Vermont is highlighting gun control in his platform. Ethan Sonneborn, who declared his candidacy last year, is calling for stricter gun control in his home state, and told CNN in an interview published Friday that the refreshed national conversation on guns in the aftermath of the Florida school shooting presents a “good opportunity to make change.” “There's always been a sense of, 'We don't talk about that in politics.' That's what I wanted to change," Ethan told CNN. "I wish it didn't take a tragedy for us to become involved in a national dialogue...